I have a 31SQB and think it's a pretty good rig. All travel trailers are compromises and there are things we really like and things we don't care for. The 31SQB has about the roomiest bathroom you can get and my wife and daughters love it and all the mirrors. The kids also really like the bunkhouse setup. Personally, I don't like the short closets in the master bedroom.
Overall, the quality is pretty good. The only warning I'd give you is to make sure it has a 15k btu air conditioner. The 13.5 btu unit doesn't get the job done in 95+ degree weather.
